Pneumatic spinning frame cleaner



June 16, 1959 l G. sEREsS PNEUMATIC SEINNING FRAME CLEANER 2 Sheets-Sheet 1 Eile'd Aug. s1, 1955 ATTORNEY June 16, 1959 ,G. SRESS 2,890,563

PNEUMATIC SPINNING FRAME CLEANER Filed Aug. 31. 1955 2 sheets-sheet 2 IN VEN TOR.

ATTORNEY 2,890,563 PNEUMATIC SPINNING CLEANER George Sress, Spartanburg, S.C. Application August 31, 1955, Serial No. 531,696

z claims. (ci. s734,s,) i l This invention relates to pneumatic devices for cleaning spinning frames and and the like and more particularly to an improved prefabricated device of the type which is commonly called a pneumatic broken ends collector.

Some of the purposes of such devices are to dispose of the broken ends occurring during the spinning process and to remove some of the lint and ys suspended in the air of a spinning room. Prior devices, while being fairly successful in carrying out these purposes, have the disadvantage of having to be made especially to be accommodated by a particular type machine since spinning frames and the like are constructed in various designs and in different sizes and gauges. Thus tubes or ducts could not be built in standard sizes and then prefabricated but had to be especially made for use with the particular system with which the cleaner is to be used. Thus, the delivery period is relatively long due to this special designing and construction substantially increasing the cost of the machine.

A further disadvantage of present cleaning systems is inherent lin the positioning of the tubes. The scavenger roll which was used formally to pick up the broken ends and to clean the front rollsV had to be removed so that the suction tube could be positioned in its former place. While the present devices are effective in disposing of broken ends and lint it would be of great advantage to have the scavenger roll ,to assist in the cleaning operation by effectively cleaning the front roll. Another diiiculty was that the suction point, ofthe tubes, provided by small holes therein, were located too far from the delivery point of the yarn to obtain maximum benet therefrom and since the delivery point varies due to the traveling motion of the yarn a small hole is often not eifective to cover the relatively large area which should be covered and a larger hole would result in excessive loss of air pressure. Since the duct employed mustnecessarily be very long to cover the .entire length of the spinning frame a drop in pressure occurs along the duct at points remote from the suction creating means since the duct has heretofore been constructed of constant cross section. The duct was so constructed since it was thought that a varying cross section would be too expensive in view of the expenses envolved in the special designing and construction heretofore necessary.

Accordingly it is an object of my invention -to provide a pneumatic cleaning device for spinning frames and the like which consists of prefabricated tubing and duct members, the various parts being adapted to be joined together by a pressed tit so that the prefabricated members may be of standard construction and accommodated by any type or size spinning frame.

Another object of my invention is the provision of means which may be positioned closely adjacent the vdelivery point of `the yarn so that maximum use may be obtained from the suction developed at that point.

Another object of my invention is to provide diverg- "of a cleaning device ing nozzles-for the purpose of applying increased suction along an area closely adjacent the delivery point to the yarn thus covering the entire area where broken ends may occur and where the majority ofA lint and flys may 'be removed, thus conserving air pressure.

Still another object of my invention is the provision employing pneumatic tubes and nozzles which may be so positioned that the scavenger roll may be maintained in its normal place and so that the various tubes and nozzles will permit the removal of the scavenger roll for cleaning same.

Yet another object of my invention is the provision of a duct which is prefabricated and constructed of sections of varying cross section, the cross section diminishing as the sections beco A e more remote from the source of air pressure, so that the various parts may be accommodated to any size and type of machine and so that there will be no variation in pressure at points remote from the source.

In general, I accomplish these and other objects of my Vinvention by providing suction producing means, a horidisposed duct adapted to be positioned in the medial portion of a spinning framefsaid duct communicating with said suction producing means and including a plurality of duct sections ofY varying cross section becoming progressively smaller as the sections become more remote from the suction producing means, intermediate duct sections joining duct sections -by a pressed t so that constant pressure may be maintained in the duet ity of spaced groups of suction tubes are positioned adcated for use with any type spinning frame. A pluraltiy of spaced groups of suction tubes are positioned adjacent and beneath the drafting system of the spinning frame and parallel to the rolls thereof, said groups of suction tubes including a plurality of open ended'tube suctio-ns, diverging nozzles projecting therefrom thus adding velocity pressure to static pressure resulting in increased pressure at the inlet of the nozzles, a plurality of intermediate tube sections joining said open ended sections as by a pressed tit, means closing the ends of each of said groups, so that the tubes may be prefabricated and stocked for use with any type spinning frame. Also provided are yielding means for so positioning the tubes, yielding means communicatively connecting the ducts and the tubes so as to create Asuction within the tubes said nozzles extending upwardly and outwardly to points closely adjacent the yarn delivery points of the drafting systems, so that increased suction is provided at ythe points of maximum usefulness.

' While some of the objects of this invention -have been stated above, others will become apparent to those skilled in the art relating to cleaning devices for textile machinery when the specification is read in connection .with the accompanying drawings in which:

Fig. 1 is a fragmentary front elevation of a spinning frame showing my improved pneumatic cleaning device associated therewith,

Fig. 2 is an enlarged front elevation showing the front roll of a spinning frame and parts associated therewith illustrating a preferred positioning of a portion of my improved device,

Fig, 3,1's an enlarged fragmentary sectional view taken substantially along the 'line 3-3 in Fig. 1.

Fig. 4 is an enlarged sectional View, similar to Fig. 3, of the upper right hand portion of a spinning frame showing a slightly modified form of my invention with parts vbroken away, and

`Fig. 5 is an enlarged front view of a modified form of nozzle section.

Referring more particularly to the drauvings `the numeral 10 broadly designates a spinning frame of any zontal, longitudinally and so that the duct may be prefabrif conventional construction. It will be noted that the spinning frame 10 is provided with the usual creel 12 carrying a number of lled bobbins or spools 14 from which rovings or slivers R are drawn through the usual drafting systems broadly indicated at 16 on Veach side of the spinning frame 10. A longitudinally disposed pair of roll stand rails 18 serve as supports for the drafting systems 16. A lower support for the bobbins 14 is provided in the form of roller beam 20.

After the yarn Y is delivered from the drafting systems 16 itis wound on bobbins 22 which are positioned within the usual ring rails 24. Rotary motion is imported to these bobbins 22 by the tapes 26 which are in turn driven by the cylinder 24.

Referring now more particularly to Fig. 1, a horizontal longitudinally disposed duct or conduit, broadly designatedY at 30, is shown disposed in the medial portion of the spinning frame 10. The duct 30 is constructed of sheet metal or the llike preferably of relatively light gauge and it will be noted that an opening 32 is provided adjacent one end thereof for the purpose of admitting air. The other end of the duct 30 communicates with a chamber 34, which is formed in a suction housing broadly designated at 36, by the partition 38. The partition 38 consists of a screen like lter which divides the housing 36 into elongated vertical chambers 34 and 40. A centr'fugal fan 42 is positioned in the chamber 40 and is driven by the belt 44 which is in turn driven by the motor 46. The fan 42 acts to create a suction in the chamber 34 and to create a suction along the duct 30 by virtue of air rushing into the opening 32 and proceeding into the chamber 34, the lint and y being deposited on the filter screen 38 and the air being exhausted from the chamber 40 through the exhaust pipe 48.

The above description generally applies to any type of pneumatic broken ends collector, however, referring again to Fig. l, it will be noted that the cross section of the duct 30 diminishes progressively at points more remote from the suction housing 40. A plurality of connection or -take oli pipes 50, which are also constructed of light gauge sheet metal or tubing, diverge upwardly in spaced relation to each other from the sides of the duct 30. These connection pipes 50 are joined to the conduit preferably by a pressed fit with a rubber or other suitable flexible type connections 52. It will be noted that a pair of these connection pipes S are employed in connection with each of the duct sections v 30a and that an intermediate duct section 30h is adapted to join these sections 30a with a pressed t, one end being fitted into a reduced end portion 30e` and the other end overlapping the larger end of the succeeding section. These `intermediate sections 30b make it possible to prefabricate the duct and to adjust 4the pressed t so that the duct may machine.

Referring now particularly to Figs. 2 and 3 it will be noted that a substantially T-shaped connecting member, preferably of cast construction, 54 is connected to the free end of the connection pipe preferably by a pressed fit and has a nozzle broadly designated at 56 carried thereby. The nozzle 56 extends upwardly and slightly outwardly in front of the front roll 16a to a point slightly below the delivery point of the yarn, the delivery point of the yarn being located at the juncture or the bite of the front roll 16a and the top roll 16b. Formally small holes were provided in the tube resulting in the loss of considerable air pressure as will be discussed further below.

A plurality of nozzle assemblies 54a which are spaced, as shown in Fig. 2, according to the gauge of the spinning frame, are connected by intermediate sections 58 which are secured between the open ends of the nozzle assemblies 54aA preferably by a pressed lit. The groups of nozzle assemblies thus formed are provided with cap be accommodated by any typev 4 members 60 on both of the free ends of terminal nozzle assemblies 54a. A projection 60a from each of the cap members 60 is provided to give support to the group of nozzle assemblies. Screws, 62, which are threaded into the drafting system support 18, pass through the projections 60a with a. loose t and a resilient mounting is provided by virtue of the coil springs 64 which urge the projections 60a upwardly against nuts 62a which are provided for threadable adjustment on the screws 62.

It will be noted, therefore, that while a continuous tube with a number of projecting nozzle assemblies may be used to advantage, the group of nozzle assemblies thus formed by several nozzle assemblies may be Prefabricated and are adapted for use with any gauge or type of spinning frame since the pressed t adjustment of the intermediate members 58 may be varied according to the gauge requirements of the spinning frame. It will be further noted that the resilient or yielding mounting alforded the group of nozzle assemblies by the coil springs 64 permits the entire group to be lowered or pushed aside so that the scavenger roll 16C may be withdrawn for purposes of cleaning. This permits the use of a scavenger roll which has heretofore been impossible because of the tubes being fixed in the place which was formerly occupied by such scavenger roll. The nozzles 56, therefore, not only permit the point of suction to be placed at the point of optimum usefulness but also permit the fixation of a scavenger roll.

It will be observed that the nozzles 56 consist of a flattened body portion 56a and a attened diverging portion 56h the mouth of which extends closely adjacent the yarn delivery points and provide suction along a substantial portion of the rolls 16a and 16b. This is the Vplace Where most of the lint and ily as well as broken ends occur. This is due to the fact that the roving or .sliver is ina loose state so that some of the pieces of fiber become disengaged because they are loosely held and tend either to lodge on the fluted front roll 16a or other parts of the machine. The providing of nozzle assemblies rather than holes in tubes result in increased suction since a velocity pressure is developed at the mouth of the nozzle which is added to static pressure.

Fig. 3 shows the usual positioning of the duct 30 beneath the roller beam so that the connecting tubes 50 are directed upwardly and outwardly to attach to the nozzle assemblies 54a. Fig. 4 shows a slightly modied form ofthe invention in which the duct 30 is positioned above the roller beam and the connecting pipes 5G extend horizontally to be joined with the nozzle assemblies 54a.

Fig. 5 shows a modified form of nozzle assembly in which the diverging or ared portion 56h is formed preferably of rubber or other exible material and is secured to the nozzle assembly 54a by a pressed t, the flat portion 56a being pressed into a connecting portion 56e provided therefor in the nozzle assembly 54a which is preferably of cast construction. It will be noted that with this modified nozzle assembly different types and lengths of nozzles may be utilized for special purposes.

It is thus seen that I have provided a novel and improved pneumatic broken ends cleaner for spinning frames and the like which can be built and stocked for machines of different gauges since the various parts are prefabricated and adapted to be joined together by pressed fits. The nozzle construction, which provides suction adjacent the yarn delivery points by adding velocity pressure to static pressure increases the suction and at the same time provides suction at the point of maximum usefulness. The diverging nozzle also permits a wider coverage of the important area to be cleaned adjacent the yarn delivery points and the positioning of the groups of nozzle assembly tubes a substantial distance below the drafting system permits the use of a scavenger roll which has heretofore been impossible with this type of pneumatic cleaner and the yielding or resilient mounting permits the withdrawal of the scavenger roll for purposes of cleaning same. The construction of the duct from sections of diminishing cross section, and varying this cross section at each point of connection with a group of nozzle assemblies makes possible conservation of air pressure as well as a constant pressure at all points throughout the duct thus assuring a uniform and effective cleaning action throughout the entire length of the machine.

While a preferred embodiment of my invention has been described using specific terms, such description is for illustrative purposes only7 and it is to be understood that changes and variations may be made without departing from the spirit or scope of the invention as defined by the appended claims.

I claim as my invention:

1. A pneumatic broken ends collector for spinning frames land the like having drafting systems and scavenger rolls and a horizontal longitudinally disposed duct positioned Within the spinning frame comprising, a plurality of spaced groups of suction tubes positioned beneath and adjacent the scavenger rolls of the spinning frame and parallel to the drafting systems, yielding means for so positioning the tubes, means producing suction in the duct, yielding means communcatively connecting the duct and the tubes so as to create suction within the tubes, and a plurality of spaced elongated nozzles extending upwardly from said tubes and in front of the scavenger rolls to points closely adjacent the yarn delivery points of the drafting system, said nozzles having attened diverging mouth portions whereby suction is provided at the points of optimum usefulness.

2. A pneumatic broken ends collector for spinning frames and the like having drafting systems and scavenger rolls comprising, suction producing means, a horizontal, longitudinally disposed duct positioned within a spindle frame communicating with said suction producing means, said duct including a plurality of duct sections of varying cross sections becoming progressively smaller as the sections become more remote from the means producing suction so that substantially constant pressure may be maintained in the duct, intermediate duct sections joining said duct sections so that the duct may be prefabricated for use with any type spinning frames, a plurality of spaced groups of suction tubes positioned beneath and adjacent the drafting system of the spinning frame and parallel to the rolls thereof, said groups of suction tubes including a plurality of open ended tube sections having nozzles projecting therefrom, a plurality of intermediate tube sections joining said open ended sections, the ends of each group being closed, so that the tubes may be prefabricated and stocked for use with any type spinning frame, yielding means for positioning the tubes so that the scavenger roll may be removed for cleaning, yielding means communicatively connecting the duct and the tubes so as to create suction within the tubes, and a plurality of diverging nozzles extending from said tubes to points closely adjacent the yarn delivery points of the drafting systems, whereby suction is provided at the points of optimum usefulness.

References Cited in the ile of this patent UNITED STATES PATENTS 

